Abstract :
Note: Under this heading brief announcements of vacancies, and men available, will be published without charge to members. Copy should be prepared by the member concerned and should reach the Secretary´s office prior to the 20th of the month. Announcements will not be repeated except upon request received after an interval of three months; during this period names and records will remain in the office reference files. All replies should be addressed to the number indicated in each case, and mailed to Institute headquarters.